Low-Cost Industrial Digital I/O – 5 V TTL/CMOS

Overview and Applications

NI 6509 devices are industrial 96-channel digital I/O interfaces for PCI

and PXI systems. They are compatible with TTL, CMOS, and 5 V digital

logic levels. An NI 6509 has 96 bidirectional digital I/O lines with high-

current-drive capabilities (24 mA), and is completely jumper-free. With

an NI 6509, you can input and output at 5 VDC digital levels and directly

drive external digital devices such as solid-state relays (SSRs) with

current up to 24 mA per channel. You can configure each port individually

for input or output, and no external power supply is required for outputs.

An NI 6509 is ideal for general-purpose data acquisition applications,

as well as industrial control and automated manufacturing test. With

high current drive, you can connect the digital I/O module directly to

a wide array of 5 V electronic devices, sensors, and actuators.

These devices offer superior features and high value for industrial

control and manufacturing test applications such as factory automation,

embedded machine control, and production line verification. They

have been designed to incorporate the latest hardware technologies

and provide innovative features for applications requiring ease of use,

high reliability, and performance. NI 6509 devices take advantage of

NI-DAQmx measurement services software (7.1 or later) to speed up

application development with many helpful features including the DAQ

Assistant, automatic code generation, and high-performance multithreaded

streaming technology.

Hardware

High-Reliability Industrial Feature Set

NI 6509 devices offer a set of high-reliability features designed to

automate even the most demanding applications:

• Programmable power-up states provide safe operation when

connected to pumps, valves, motors, and relays

• Digital I/O watchdogs detect computer or application errors and

ensure safe recovery

• Change detection triggers your application and returns I/O data

after a digital event with minimal processor usage

• Programmable input filters eliminate glitches/spikes and remove noise

Glitch-Free Startup with Programmable

Power-Up States

With programmable power-up states, you can configure the initial

NI 6509 output states in software to ensure glitch-free operations when

connected to industrial actuators such as pumps, valves, motors, and

relays. An NI 6509 holds these I/O states after receiving power, so your

computer can boot and your software application can begin running. The

programmable power-up states are glitch-free, meaning the outputs

never go through an incorrect state during power up.

You can configure digital lines as high-impedance input, high output,

or low output. The digital I/O device stores the settings in onboard

nonvolatile memory and implements the power-up states automatically

after power is applied to the device.

• 96 bidirectional input/output lines

(5 V TTL/CMOS)

• High current drive (24 mA sink or source)

• High-reliability industrial feature set –

programmable power-up states, digital

I/O watchdogs, change detection,

programmable input filters

• Low-cost solution with superior

features for data acquisition,

manufacturing test, and industrial

control applications

• Direct connection to 5 V logic devices

and most solid-state relays (SSRs)

• NI-DAQmx software for highest

productivity and performance

(NI-DAQmx 7.1 or later)

Operating Systems

• Windows Vista/XP/2000

Recommended Software

• LabVIEW

• Measurement Studio

Other Compatible Software

• Visual Studio .NET, C#

• Visual Basic 6.0

• ANSI C/C++

• LabVIEW SignalExpress

Measurement Services

Software (included)

• NI-DAQmx driver software

• Measurement & Automation

Explorer configuration utility

• LabVIEW SignalExpress LE

data-logging software

NI PXI-6509, NI PCI-6509

Product

Bus

Input Lines

Output Lines

Isolation

Max Range

Low Thresh.

High Thresh.

Output Current

Industrial Feature Set

NI 6509

PCI, PXI

–

-0.5..5.5 V

0.8 V

2.0 V

±24 mA



1

The PCI-6509 features 96 bidirectional I/O lines. Line direction is selectable on an 8-bit port basis.

Table 1. NI 6509 Specifications Overview